Hey guys, I picked up a 2003 copen the other week. Loving it so far, the roof makes a horrendous cracking noise on bumps so I'll need to adjust the roof but past that it's awesome. My other car is a 2022 Daihatsu Hijet!
Good day and Welcome. I've always found whilst adjustments may temporarily help, those rattles always come back. Just part of the Copen 'charm'. Answer- just get a louder stereo